Asteroids and comets appear to be a much more important supplier of organic molecules on Mars than expected. Until now, astronomers assumed that the organics on Mars mainly came from dust particles from space. Now, computer ...

The sun will rise on NASA's solar-powered Mars rover Opportunity for the 5,000th time on Saturday, sending rays of energy to a golf-cart-size robotic field geologist that continues to provide revelations about the Red Planet.

A new self-portrait of NASA's Curiosity Mars rover shows the vehicle on Vera Rubin Ridge, which it has been investigating for the past several months. Directly behind the rover is the start of a clay-rich slope scientists ...

In everyday life we look and touch things to find out what they are made of. A powerful scientific technique does the same using lasers – and in two years' time it will fly in space for the first time.